It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 240 664 is not a prime number.
For example, 240 664 can be divided by 2: 240 664 / 2 = 120 332.
For 240 664 to be a prime number, it would have been required that 240 664 has only two divisors, i.e., itself and 1.
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240 664 is an even number, because it is evenly divisible by 2: 240 664 / 2 = 120 332.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 240 664 is about 490.575.
Thus, the square root of 240 664 is not an integer, and therefore 240 664 is not a square number.
The square of a number (here 240 664) is the result of the product of this number (240 664) by itself (i.e., 240 664 × 240 664); the square of 240 664 is sometimes called "raising 240 664 to the power 2", or "240 664 squared".
The square of 240 664 is 57 919 160 896 because 240 664 × 240 664 = 240 6642 = 57 919 160 896.
As a consequence, 240 664 is the square root of 57 919 160 896.
The multiples of 240 664 are all integers evenly divisible by 240 664, that is all numbers such that the remainder of the division by 240 664 is zero. There are infinitely many multiples of 240 664. The smallest multiples of 240 664 are: